Mrs Parker had her work cut out keeping the news a secret until Wednesday night, when about 100 sponsors and supporters of the trust were invited to a function at Amisfield Winery to hear the good news.
The announcement meant the CTOS had invested $1 million in the Queenstown Trail - and the additional money had secured the Government's $1.8 million loan.
"I'm over the moon. I can't stop smiling," Mrs Parker said.
"We are all so grateful. This is fantastic for us, the two local community trusts having so much confidence in us. We now know exactly where we are financially ... [and] we will be able to complete this."
The track will incorporate 90km for cycling, walking and running from Queenstown Bay to Gibbston.
Of the trail, 33km is already in place, with another 57km to be constructed, which will include seven bridges and two underpasses.
A further 24km at Gibbston has been earmarked for development along with another section at Frankton, which is on hold until tenders are received.
Mrs Parker said one of the most exciting aspects was that, for the first time, communities throughout the Wakatipu Basin would be linked by an accessible trail.
"That's pretty important for Lake Hayes Estate, Quail Rise, the proposed Shotover Country [development] and Remarkables Primary - that's a further consideration.
"Those children are young ... but as they grow up, if the high school moves out [to Frankton or near Arrowtown], it's going to be really important for it as well.
"This town can be expensive and we know that ... this is absolutely free and it's a fantastic recreation pursuit in one of the most beautiful natural landscapes in the world - and we all get to have it."
CTOS chief executive John Prendergast told the Queenstown Times not only would the Queenstown Trail be attractive for tourists, it would solve a "big issue" for Queenstown and the Wakatipu Basin.
Those using the track would not be on the state highway network, making it safer for them, and it would also save money and be of benefit to the environment in the long term.
Mrs Parker said there was still about $500,000 to raise - the majority of which she hoped to secure this year.
The New World Wakatipu Trailblazer will be held again on November 18, in which walkers, runners and cyclists will traverse the track between Jacks Point and Jardine Park, thereby raising money for the Queenstown Trail.
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